<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Ajax</title>
</head>
<body>

<script>
    //创建核心对象
    var xhttp;
    if (window.XMLHttpRequest) {
        xhttp = new XMLHttpRequest();
    } else {
        // code for IE6, IE5
        xhttp = new ActiveXObject("Microsoft.XMLHTTP");
    }
    //发送请求
    xhttp.open("GET", "http://localhost:8080/ajax/ajaxServlet1");
    xhttp.send();
    //获取响应
    xhttp.onreadystatechange = function () {
        if (this.readyState == 4 && this.status == 200) {
            document.write(this.responseText);
        }
    };
</script>
</body>
</html>